2022-01-18T03:46:26Zhttps://tsukuba.repo.nii.ac.jp/oaioai:tsukuba.repo.nii.ac.jp:000285962021-03-02T06:57:21ZOverlap of quasiparticle random-phase approximation states based on ground states of different nuclei: Mathematical properties and test calculations寺崎, 順Terasaki, J.The overlap of the excited states in quasiparticle random-phase approximation (QRPA) is calculated to simulate the overlap of the intermediate nuclear states of the double-β decay. Our basic idea is to use the like-particle QRPA with the aid of the closure approximation and calculate the overlap as rigorously as possible by making use of the explicit equation of the QRPA ground state. The formulation is shown in detail, and the mathematical properties of the overlap matrix are investigated. Two test calculations are performed for relatively light nuclei with the Skyrme and volume δ-pairing energy functionals. The validity of the truncations used in the calculation is examined and confirmed.journal articleThe American Physical Society2013-02application/pdfPhysical review C287024316http://hdl.handle.net/2241/1187590556-2813AA00773613https://tsukuba.repo.nii.ac.jp/record/28596/files/PRC_87-2.pdfeng10.1103/PhysRevC.87.024316©2013 American Physical Society